The Halibut Bay 42 is a chromium mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Halibut Bay 42 MRDS details
Site Name
Primary: Halibut Bay 42
Commodity
Primary: Chromium
Location
State: Alaska
District: Kodiak
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Podiform chromite (minor)
Model Name: Podiform chromite (major)
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: The ultramafic country rock is serpentinized.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = This chromite occurrence, one of several known within the Halibut Bay ultramafic complex, consists of a 3-foot wide zone containing narrow bands of chromite, each less than 2 inches thick , enclosed by serpentinized dunite. The zone strikes N. 5 E. and dips 70 W. and has an undetermined strike length. The grade of the zone is estimated to be 10 percent chromite (Foley and Barker, 1885, table 13). Some disseminated chromite is present for 20 feet on either side of the zone. The combined grade of the zone and surrounding rock is estimated to be 4 percent or less chromite. A bulk sample had a head grade of 16.7 percent chromite and a gravily concentrate grade of 40 percent chromite. The concentrate had a chrome:iron ratio of 1.3 and contained traces of gold, silver, platinum, and palladium (Dehlin and others, 1985, table A-25) ? the dunite is a part of the Halibut Bay ultramafic complex, which also includes gabbro, pyroxenite, and peridotite. the complex occurs within sedimentary units of the Uyak formation of Cretaceous age.
Comment (Reference): Primary Reference = Foley and Barker, 1985
Comment (Workings): Workings / Exploration = Foley and Barker (1985, table 13) estimate a grade of 10 percent chromite for the main zone. A high grade bulk sample had a head grade of 16.7 percent chromite and a gravity concentrate grade of 40.0 percent. The concentrate had a chrome:iron ratio of 1.3 and contained traces of gold, silver, platinum, and palladium (Dahlin and others, 1985, table A-25).
Comment (Deposit): Model Name = Podiform chromite (Cox and Singer, 1986; models 8a, 8b).
Comment (Deposit): Model Number = 8a, 8b
Comment (Deposit): Other Comments = Site is located in Kodiak National Wildlife Refuge.
References
Reference (Deposit): Foley, J.Y., and Barker, J.C., 1985, Chromite deposits along the Border Ranges fault, part 1, Field investigations and descriptions of chromite deposits: U.S. Bureau of Mines Information Circular 8990, 58 p.
Reference (Deposit): Dahlin, D.C., Kirby, D.E., and Brown, L.L., 1985, Chromite deposits along the Border Ranges fault, southern Alaska, part 2, Mineralogy and results of beneficiation tests: U.S. Bureau of Mines Information Circular 8991, 37 p.
Reference (Deposit): Foley, J.Y., Burns, L.E., Schneider, C.L., and Forbes, R.B., 1989, Preliminary report of platinum group element occurrences in Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 89-20, 32 p., 1 map sheet, scale 1:2,500,000.
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